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Note 11 - Geographic And Segment Information (Details) - Total assets by geographic distribution (USD $)
May 31, 2013
Aug. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]    
Total assets $ 46,511,313 $ 41,877,627
Brazil [Member]
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Total assets 1,308,385 1,744,693
North America [Member]
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Total assets $ 45,202,928 $ 40,132,934